| /* |
| * |
| * arch/arm/mach-u300/core.c |
| * |
| * |
| * Copyright (C) 2007-2009 ST-Ericsson AB |
| * License terms: GNU General Public License (GPL) version 2 |
| * Core platform support, IRQ handling and device definitions. |
| * Author: Linus Walleij <linus.walleij@stericsson.com> |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/bitops.h> |
| #include <linux/device.h> |
| #include <linux/mm.h> |
| #include <linux/termios.h> |
| #include <linux/amba/bus.h> |
| #include <linux/platform_device.h> |
| #include <linux/gpio.h> |
| |
| #include <asm/types.h> |
| #include <asm/setup.h> |
| #include <asm/memory.h> |
| #include <asm/hardware/vic.h> |
| #include <asm/mach/map.h> |
| #include <asm/mach/irq.h> |
| |
| #include <mach/hardware.h> |
| #include <mach/syscon.h> |
| |
| #include "clock.h" |
| #include "mmc.h" |
| #include "spi.h" |
| #include "i2c.h" |
| |
| /* |
| * Static I/O mappings that are needed for booting the U300 platforms. The |
| * only things we need are the areas where we find the timer, syscon and |
| * intcon, since the remaining device drivers will map their own memory |
| * physical to virtual as the need arise. |
| */ |
| static struct map_desc u300_io_desc[] __initdata = { |
| { |
| .virtual = U300_SLOW_PER_VIRT_BASE, |
| .pfn = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE), |
| .length = SZ_64K, |
| .type = MT_DEVICE, |
| }, |
| { |
| .virtual = U300_AHB_PER_VIRT_BASE, |
| .pfn = __phys_to_pfn(U300_AHB_PER_PHYS_BASE), |
| .length = SZ_32K, |
| .type = MT_DEVICE, |
| }, |
| { |
| .virtual = U300_FAST_PER_VIRT_BASE, |
| .pfn = __phys_to_pfn(U300_FAST_PER_PHYS_BASE), |
| .length = SZ_32K, |
| .type = MT_DEVICE, |
| }, |
| { |
| .virtual = 0xffff2000, /* TCM memory */ |
| .pfn = __phys_to_pfn(0xffff2000), |
| .length = SZ_16K, |
| .type = MT_DEVICE, |
| }, |
| |
| /* |
| * This overlaps with the IRQ vectors etc at 0xffff0000, so these |
| * may have to be moved to 0x00000000 in order to use the ROM. |
| */ |
| /* |
| { |
| .virtual = U300_BOOTROM_VIRT_BASE, |
| .pfn = __phys_to_pfn(U300_BOOTROM_PHYS_BASE), |
| .length = SZ_64K, |
| .type = MT_ROM, |
| }, |
| */ |
| }; |
| |
| void __init u300_map_io(void) |
| { |
| iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc)); |
| } |
| |
| /* |
| * Declaration of devices found on the U300 board and |
| * their respective memory locations. |
| */ |
| static struct amba_device uart0_device = { |
| .dev = { |
| .init_name = "uart0", /* Slow device at 0x3000 offset */ |
| .platform_data = NULL, |
| }, |
| .res = { |
| .start = U300_UART0_BASE, |
| .end = U300_UART0_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_U300_UART0, NO_IRQ }, |
| }; |
| |
| /* The U335 have an additional UART1 on the APP CPU */ |
| #ifdef CONFIG_MACH_U300_BS335 |
| static struct amba_device uart1_device = { |
| .dev = { |
| .init_name = "uart1", /* Fast device at 0x7000 offset */ |
| .platform_data = NULL, |
| }, |
| .res = { |
| .start = U300_UART1_BASE, |
| .end = U300_UART1_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_U300_UART1, NO_IRQ }, |
| }; |
| #endif |
| |
| static struct amba_device pl172_device = { |
| .dev = { |
| .init_name = "pl172", /* AHB device at 0x4000 offset */ |
| .platform_data = NULL, |
| }, |
| .res = { |
| .start = U300_EMIF_CFG_BASE, |
| .end = U300_EMIF_CFG_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| }; |
| |
| |
| /* |
| * Everything within this next ifdef deals with external devices connected to |
| * the APP SPI bus. |
| */ |
| static struct amba_device pl022_device = { |
| .dev = { |
| .coherent_dma_mask = ~0, |
| .init_name = "pl022", /* Fast device at 0x6000 offset */ |
| }, |
| .res = { |
| .start = U300_SPI_BASE, |
| .end = U300_SPI_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = {IRQ_U300_SPI, NO_IRQ }, |
| /* |
| * This device has a DMA channel but the Linux driver does not use |
| * it currently. |
| */ |
| }; |
| |
| static struct amba_device mmcsd_device = { |
| .dev = { |
| .init_name = "mmci", /* Fast device at 0x1000 offset */ |
| .platform_data = NULL, /* Added later */ |
| }, |
| .res = { |
| .start = U300_MMCSD_BASE, |
| .end = U300_MMCSD_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = {IRQ_U300_MMCSD_MCIINTR0, IRQ_U300_MMCSD_MCIINTR1 }, |
| /* |
| * This device has a DMA channel but the Linux driver does not use |
| * it currently. |
| */ |
| }; |
| |
| /* |
| * The order of device declaration may be important, since some devices |
| * have dependencies on other devices being initialized first. |
| */ |
| static struct amba_device *amba_devs[] __initdata = { |
| &uart0_device, |
| #ifdef CONFIG_MACH_U300_BS335 |
| &uart1_device, |
| #endif |
| &pl022_device, |
| &pl172_device, |
| &mmcsd_device, |
| }; |
| |
| /* Here follows a list of all hw resources that the platform devices |
| * allocate. Note, clock dependencies are not included |
| */ |
| |
| static struct resource gpio_resources[] = { |
| { |
| .start = U300_GPIO_BASE, |
| .end = (U300_GPIO_BASE + SZ_4K - 1), |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .name = "gpio0", |
| .start = IRQ_U300_GPIO_PORT0, |
| .end = IRQ_U300_GPIO_PORT0, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "gpio1", |
| .start = IRQ_U300_GPIO_PORT1, |
| .end = IRQ_U300_GPIO_PORT1, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "gpio2", |
| .start = IRQ_U300_GPIO_PORT2, |
| .end = IRQ_U300_GPIO_PORT2, |
| .flags = IORESOURCE_IRQ, |
| }, |
| #ifdef U300_COH901571_3 |
| { |
| .name = "gpio3", |
| .start = IRQ_U300_GPIO_PORT3, |
| .end = IRQ_U300_GPIO_PORT3, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "gpio4", |
| .start = IRQ_U300_GPIO_PORT4, |
| .end = IRQ_U300_GPIO_PORT4, |
| .flags = IORESOURCE_IRQ, |
| }, |
| #ifdef CONFIG_MACH_U300_BS335 |
| { |
| .name = "gpio5", |
| .start = IRQ_U300_GPIO_PORT5, |
| .end = IRQ_U300_GPIO_PORT5, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "gpio6", |
| .start = IRQ_U300_GPIO_PORT6, |
| .end = IRQ_U300_GPIO_PORT6, |
| .flags = IORESOURCE_IRQ, |
| }, |
| #endif /* CONFIG_MACH_U300_BS335 */ |
| #endif /* U300_COH901571_3 */ |
| }; |
| |
| static struct resource keypad_resources[] = { |
| { |
| .start = U300_KEYPAD_BASE, |
| .end = U300_KEYPAD_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .name = "coh901461-press", |
| .start = IRQ_U300_KEYPAD_KEYBF, |
| .end = IRQ_U300_KEYPAD_KEYBF, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "coh901461-release", |
| .start = IRQ_U300_KEYPAD_KEYBR, |
| .end = IRQ_U300_KEYPAD_KEYBR, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct resource rtc_resources[] = { |
| { |
| .start = U300_RTC_BASE, |
| .end = U300_RTC_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .start = IRQ_U300_RTC, |
| .end = IRQ_U300_RTC, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| /* |
| * Fsmc does have IRQs: #43 and #44 (NFIF and NFIF2) |
| * but these are not yet used by the driver. |
| */ |
| static struct resource fsmc_resources[] = { |
| { |
| .start = U300_NAND_IF_PHYS_BASE, |
| .end = U300_NAND_IF_PHYS_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| }; |
| |
| static struct resource i2c0_resources[] = { |
| { |
| .start = U300_I2C0_BASE, |
| .end = U300_I2C0_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .start = IRQ_U300_I2C0, |
| .end = IRQ_U300_I2C0, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct resource i2c1_resources[] = { |
| { |
| .start = U300_I2C1_BASE, |
| .end = U300_I2C1_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .start = IRQ_U300_I2C1, |
| .end = IRQ_U300_I2C1, |
| .flags = IORESOURCE_IRQ, |
| }, |
| |
| }; |
| |
| static struct resource wdog_resources[] = { |
| { |
| .start = U300_WDOG_BASE, |
| .end = U300_WDOG_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .start = IRQ_U300_WDOG, |
| .end = IRQ_U300_WDOG, |
| .flags = IORESOURCE_IRQ, |
| } |
| }; |
| |
| /* TODO: These should be protected by suitable #ifdef's */ |
| static struct resource ave_resources[] = { |
| { |
| .name = "AVE3e I/O Area", |
| .start = U300_VIDEOENC_BASE, |
| .end = U300_VIDEOENC_BASE + SZ_512K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .name = "AVE3e IRQ0", |
| .start = IRQ_U300_VIDEO_ENC_0, |
| .end = IRQ_U300_VIDEO_ENC_0, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "AVE3e IRQ1", |
| .start = IRQ_U300_VIDEO_ENC_1, |
| .end = IRQ_U300_VIDEO_ENC_1, |
| .flags = IORESOURCE_IRQ, |
| }, |
| { |
| .name = "AVE3e Physmem Area", |
| .start = 0, /* 0 will be remapped to reserved memory */ |
| .end = SZ_1M - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| /* |
| * The AVE3e requires two regions of 256MB that it considers |
| * "invisible". The hardware will not be able to access these |
| * addresses, so they should never point to system RAM. |
| */ |
| { |
| .name = "AVE3e Reserved 0", |
| .start = 0xd0000000, |
| .end = 0xd0000000 + SZ_256M - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .name = "AVE3e Reserved 1", |
| .start = 0xe0000000, |
| .end = 0xe0000000 + SZ_256M - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| }; |
| |
| static struct platform_device wdog_device = { |
| .name = "wdog", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(wdog_resources), |
| .resource = wdog_resources, |
| }; |
| |
| static struct platform_device i2c0_device = { |
| .name = "stu300", |
| .id = 0, |
| .num_resources = ARRAY_SIZE(i2c0_resources), |
| .resource = i2c0_resources, |
| }; |
| |
| static struct platform_device i2c1_device = { |
| .name = "stu300", |
| .id = 1, |
| .num_resources = ARRAY_SIZE(i2c1_resources), |
| .resource = i2c1_resources, |
| }; |
| |
| static struct platform_device gpio_device = { |
| .name = "u300-gpio", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(gpio_resources), |
| .resource = gpio_resources, |
| }; |
| |
| static struct platform_device keypad_device = { |
| .name = "keypad", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(keypad_resources), |
| .resource = keypad_resources, |
| }; |
| |
| static struct platform_device rtc_device = { |
| .name = "rtc-coh901331", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(rtc_resources), |
| .resource = rtc_resources, |
| }; |
| |
| static struct platform_device fsmc_device = { |
| .name = "nandif", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(fsmc_resources), |
| .resource = fsmc_resources, |
| }; |
| |
| static struct platform_device ave_device = { |
| .name = "video_enc", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(ave_resources), |
| .resource = ave_resources, |
| }; |
| |
| /* |
| * Notice that AMBA devices are initialized before platform devices. |
| * |
| */ |
| static struct platform_device *platform_devs[] __initdata = { |
| &i2c0_device, |
| &i2c1_device, |
| &keypad_device, |
| &rtc_device, |
| &gpio_device, |
| &fsmc_device, |
| &wdog_device, |
| &ave_device |
| }; |
| |
| |
| /* |
| * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected |
| * together so some interrupts are connected to the first one and some |
| * to the second one. |
| */ |
| void __init u300_init_irq(void) |
| { |
| u32 mask[2] = {0, 0}; |
| int i; |
| |
| for (i = 0; i < NR_IRQS; i++) |
| set_bit(i, (unsigned long *) &mask[0]); |
| u300_enable_intcon_clock(); |
| vic_init((void __iomem *) U300_INTCON0_VBASE, 0, mask[0], mask[0]); |
| vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1], mask[1]); |
| } |
| |
| |
| /* |
| * U300 platforms peripheral handling |
| */ |
| struct db_chip { |
| u16 chipid; |
| const char *name; |
| }; |
| |
| /* |
| * This is a list of the Digital Baseband chips used in the U300 platform. |
| */ |
| static struct db_chip db_chips[] __initdata = { |
| { |
| .chipid = 0xb800, |
| .name = "DB3000", |
| }, |
| { |
| .chipid = 0xc000, |
| .name = "DB3100", |
| }, |
| { |
| .chipid = 0xc800, |
| .name = "DB3150", |
| }, |
| { |
| .chipid = 0xd800, |
| .name = "DB3200", |
| }, |
| { |
| .chipid = 0xe000, |
| .name = "DB3250", |
| }, |
| { |
| .chipid = 0xe800, |
| .name = "DB3210", |
| }, |
| { |
| .chipid = 0xf000, |
| .name = "DB3350 P1x", |
| }, |
| { |
| .chipid = 0xf100, |
| .name = "DB3350 P2x", |
| }, |
| { |
| .chipid = 0x0000, /* List terminator */ |
| .name = NULL, |
| } |
| }; |
| |
| static void __init u300_init_check_chip(void) |
| { |
| |
| u16 val; |
| struct db_chip *chip; |
| const char *chipname; |
| const char unknown[] = "UNKNOWN"; |
| |
| /* Read out and print chip ID */ |
| val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR); |
| /* This is in funky bigendian order... */ |
| val = (val & 0xFFU) << 8 | (val >> 8); |
| chip = db_chips; |
| chipname = unknown; |
| |
| for ( ; chip->chipid; chip++) { |
| if (chip->chipid == (val & 0xFF00U)) { |
| chipname = chip->name; |
| break; |
| } |
| } |
| printk(KERN_INFO "Initializing U300 system on %s baseband chip " \ |
| "(chip ID 0x%04x)\n", chipname, val); |
| |
| #ifdef CONFIG_MACH_U300_BS26 |
| if ((val & 0xFF00U) != 0xc800) { |
| printk(KERN_ERR "Platform configured for BS25/BS26 " \ |
| "with DB3150 but %s detected, expect problems!", |
| chipname); |
| } |
| #endif |
| #ifdef CONFIG_MACH_U300_BS330 |
| if ((val & 0xFF00U) != 0xd800) { |
| printk(KERN_ERR "Platform configured for BS330 " \ |
| "with DB3200 but %s detected, expect problems!", |
| chipname); |
| } |
| #endif |
| #ifdef CONFIG_MACH_U300_BS335 |
| if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) { |
| printk(KERN_ERR "Platform configured for BS365 " \ |
| " with DB3350 but %s detected, expect problems!", |
| chipname); |
| } |
| #endif |
| #ifdef CONFIG_MACH_U300_BS365 |
| if ((val & 0xFF00U) != 0xe800) { |
| printk(KERN_ERR "Platform configured for BS365 " \ |
| "with DB3210 but %s detected, expect problems!", |
| chipname); |
| } |
| #endif |
| |
| |
| } |
| |
| /* |
| * Some devices and their resources require reserved physical memory from |
| * the end of the available RAM. This function traverses the list of devices |
| * and assigns actual addresses to these. |
| */ |
| static void __init u300_assign_physmem(void) |
| { |
| unsigned long curr_start = __pa(high_memory); |
| int i, j; |
| |
| for (i = 0; i < ARRAY_SIZE(platform_devs); i++) { |
| for (j = 0; j < platform_devs[i]->num_resources; j++) { |
| struct resource *const res = |
| &platform_devs[i]->resource[j]; |
| |
| if (IORESOURCE_MEM == res->flags && |
| 0 == res->start) { |
| res->start = curr_start; |
| res->end += curr_start; |
| curr_start += (res->end - res->start + 1); |
| |
| printk(KERN_INFO "core.c: Mapping RAM " \ |
| "%#x-%#x to device %s:%s\n", |
| res->start, res->end, |
| platform_devs[i]->name, res->name); |
| } |
| } |
| } |
| } |
| |
| void __init u300_init_devices(void) |
| { |
| int i; |
| u16 val; |
| |
| /* Check what platform we run and print some status information */ |
| u300_init_check_chip(); |
| |
| /* Set system to run at PLL208, max performance, a known state. */ |
| val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR); |
| val &= ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK; |
| writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR); |
| /* Wait for the PLL208 to lock if not locked in yet */ |
| while (!(readw(U300_SYSCON_VBASE + U300_SYSCON_CSR) & |
| U300_SYSCON_CSR_PLL208_LOCK_IND)); |
| /* Initialize SPI device with some board specifics */ |
| u300_spi_init(&pl022_device); |
| |
| /* Register the AMBA devices in the AMBA bus abstraction layer */ |
| u300_clock_primecells(); |
| for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { |
| struct amba_device *d = amba_devs[i]; |
| amba_device_register(d, &iomem_resource); |
| } |
| u300_unclock_primecells(); |
| |
| u300_assign_physmem(); |
| |
| /* Register subdevices on the I2C buses */ |
| u300_i2c_register_board_devices(); |
| |
| /* Register subdevices on the SPI bus */ |
| u300_spi_register_board_devices(); |
| |
| /* Register the platform devices */ |
| platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs)); |
| |
| #ifndef CONFIG_MACH_U300_SEMI_IS_SHARED |
| /* |
| * Enable SEMI self refresh. Self-refresh of the SDRAM is entered when |
| * both subsystems are requesting this mode. |
| * If we not share the Acc SDRAM, this is never the case. Therefore |
| * enable it here from the App side. |
| */ |
| val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) | |
| U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE; |
| writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR); |
| #endif /* CONFIG_MACH_U300_SEMI_IS_SHARED */ |
| } |
| |
| static int core_module_init(void) |
| { |
| /* |
| * This needs to be initialized later: it needs the input framework |
| * to be initialized first. |
| */ |
| return mmc_init(&mmcsd_device); |
| } |
| module_init(core_module_init); |